Commit Graph

49 Commits

  • chore: clean up argument-comment lint and roll out all-target CI on macOS (#16054)
    ## Why
    
    `argument-comment-lint` was green in CI even though the repo still had
    many uncommented literal arguments. The main gap was target coverage:
    the repo wrapper did not force Cargo to inspect test-only call sites, so
    examples like the `latest_session_lookup_params(true, ...)` tests in
    `codex-rs/tui_app_server/src/lib.rs` never entered the blocking CI path.
    
    This change cleans up the existing backlog, makes the default repo lint
    path cover all Cargo targets, and starts rolling that stricter CI
    enforcement out on the platform where it is currently validated.
    
    ## What changed
    
    - mechanically fixed existing `argument-comment-lint` violations across
    the `codex-rs` workspace, including tests, examples, and benches
    - updated `tools/argument-comment-lint/run-prebuilt-linter.sh` and
    `tools/argument-comment-lint/run.sh` so non-`--fix` runs default to
    `--all-targets` unless the caller explicitly narrows the target set
    - fixed both wrappers so forwarded cargo arguments after `--` are
    preserved with a single separator
    - documented the new default behavior in
    `tools/argument-comment-lint/README.md`
    - updated `rust-ci` so the macOS lint lane keeps the plain wrapper
    invocation and therefore enforces `--all-targets`, while Linux and
    Windows temporarily pass `-- --lib --bins`
    
    That temporary CI split keeps the stricter all-targets check where it is
    already cleaned up, while leaving room to finish the remaining Linux-
    and Windows-specific target-gated cleanup before enabling
    `--all-targets` on those runners. The Linux and Windows failures on the
    intermediate revision were caused by the wrapper forwarding bug, not by
    additional lint findings in those lanes.
    
    ## Validation
    
    - `bash -n tools/argument-comment-lint/run.sh`
    - `bash -n tools/argument-comment-lint/run-prebuilt-linter.sh`
    - shell-level wrapper forwarding check for `-- --lib --bins`
    - shell-level wrapper forwarding check for `-- --tests`
    - `just argument-comment-lint`
    - `cargo test` in `tools/argument-comment-lint`
    - `cargo test -p codex-terminal-detection`
    
    ## Follow-up
    
    - Clean up remaining Linux-only target-gated callsites, then switch the
    Linux lint lane back to the plain wrapper invocation.
    - Clean up remaining Windows-only target-gated callsites, then switch
    the Windows lint lane back to the plain wrapper invocation.
  • Use AbsolutePathBuf for cwd state (#15710)
    Migrate `cwd` and related session/config state to `AbsolutePathBuf` so
    downstream consumers consistently see absolute working directories.
    
    Add test-only `.abs()` helpers for `Path`, `PathBuf`, and `TempDir`, and
    update branch-local tests to use them instead of
    `AbsolutePathBuf::try_from(...)`.
    
    For the remaining TUI/app-server snapshot coverage that renders absolute
    cwd values, keep the snapshots unchanged and skip the Windows-only cases
    where the platform-specific absolute path layout differs.
  • Add Smart Approvals guardian review across core, app-server, and TUI (#13860)
    ## Summary
    - add `approvals_reviewer = "user" | "guardian_subagent"` as the runtime
    control for who reviews approval requests
    - route Smart Approvals guardian review through core for command
    execution, file changes, managed-network approvals, MCP approvals, and
    delegated/subagent approval flows
    - expose guardian review in app-server with temporary unstable
    `item/autoApprovalReview/{started,completed}` notifications carrying
    `targetItemId`, `review`, and `action`
    - update the TUI so Smart Approvals can be enabled from `/experimental`,
    aligned with the matching `/approvals` mode, and surfaced clearly while
    reviews are pending or resolved
    
    ## Runtime model
    This PR does not introduce a new `approval_policy`.
    
    Instead:
    - `approval_policy` still controls when approval is needed
    - `approvals_reviewer` controls who reviewable approval requests are
    routed to:
      - `user`
      - `guardian_subagent`
    
    `guardian_subagent` is a carefully prompted reviewer subagent that
    gathers relevant context and applies a risk-based decision framework
    before approving or denying the request.
    
    The `smart_approvals` feature flag is a rollout/UI gate. Core runtime
    behavior keys off `approvals_reviewer`.
    
    When Smart Approvals is enabled from the TUI, it also switches the
    current `/approvals` settings to the matching Smart Approvals mode so
    users immediately see guardian review in the active thread:
    - `approval_policy = on-request`
    - `approvals_reviewer = guardian_subagent`
    - `sandbox_mode = workspace-write`
    
    Users can still change `/approvals` afterward.
    
    Config-load behavior stays intentionally narrow:
    - plain `smart_approvals = true` in `config.toml` remains just the
    rollout/UI gate and does not auto-set `approvals_reviewer`
    - the deprecated `guardian_approval = true` alias migration does
    backfill `approvals_reviewer = "guardian_subagent"` in the same scope
    when that reviewer is not already configured there, so old configs
    preserve their original guardian-enabled behavior
    
    ARC remains a separate safety check. For MCP tool approvals, ARC
    escalations now flow into the configured reviewer instead of always
    bypassing guardian and forcing manual review.
    
    ## Config stability
    The runtime reviewer override is stable, but the config-backed
    app-server protocol shape is still settling.
    
    - `thread/start`, `thread/resume`, and `turn/start` keep stable
    `approvalsReviewer` overrides
    - the config-backed `approvals_reviewer` exposure returned via
    `config/read` (including profile-level config) is now marked
    `[UNSTABLE]` / experimental in the app-server protocol until we are more
    confident in that config surface
    
    ## App-server surface
    This PR intentionally keeps the guardian app-server shape narrow and
    temporary.
    
    It adds generic unstable lifecycle notifications:
    - `item/autoApprovalReview/started`
    - `item/autoApprovalReview/completed`
    
    with payloads of the form:
    - `{ threadId, turnId, targetItemId, review, action? }`
    
    `review` is currently:
    - `{ status, riskScore?, riskLevel?, rationale? }`
    - where `status` is one of `inProgress`, `approved`, `denied`, or
    `aborted`
    
    `action` carries the guardian action summary payload from core when
    available. This lets clients render temporary standalone pending-review
    UI, including parallel reviews, even when the underlying tool item has
    not been emitted yet.
    
    These notifications are explicitly documented as `[UNSTABLE]` and
    expected to change soon.
    
    This PR does **not** persist guardian review state onto `thread/read`
    tool items. The intended follow-up is to attach guardian review state to
    the reviewed tool item lifecycle instead, which would improve
    consistency with manual approvals and allow thread history / reconnect
    flows to replay guardian review state directly.
    
    ## TUI behavior
    - `/experimental` exposes the rollout gate as `Smart Approvals`
    - enabling it in the TUI enables the feature and switches the current
    session to the matching Smart Approvals `/approvals` mode
    - disabling it in the TUI clears the persisted `approvals_reviewer`
    override when appropriate and returns the session to default manual
    review when the effective reviewer changes
    - `/approvals` still exposes the reviewer choice directly
    - the TUI renders:
    - pending guardian review state in the live status footer, including
    parallel review aggregation
      - resolved approval/denial state in history
    
    ## Scope notes
    This PR includes the supporting core/runtime work needed to make Smart
    Approvals usable end-to-end:
    - shell / unified-exec / apply_patch / managed-network / MCP guardian
    review
    - delegated/subagent approval routing into guardian review
    - guardian review risk metadata and action summaries for app-server/TUI
    - config/profile/TUI handling for `smart_approvals`, `guardian_approval`
    alias migration, and `approvals_reviewer`
    - a small internal cleanup of delegated approval forwarding to dedupe
    fallback paths and simplify guardian-vs-parent approval waiting (no
    intended behavior change)
    
    Out of scope for this PR:
    - redesigning the existing manual approval protocol shapes
    - persisting guardian review state onto app-server `ThreadItem`s
    - delegated MCP elicitation auto-review (the current delegated MCP
    guardian shim only covers the legacy `RequestUserInput` path)
    
    ---------
    
    Co-authored-by: Codex <noreply@openai.com>
  • add fast mode toggle (#13212)
    - add a local Fast mode setting in codex-core (similar to how model id
    is currently stored on disk locally)
    - send `service_tier=priority` on requests when Fast is enabled
    - add `/fast` in the TUI and persist it locally
    - feature flag
  • core: bundle settings diff updates into one dev/user envelope (#12417)
    ## Summary
    - bundle contextual prompt injection into at most one developer message
    plus one contextual user message in both:
      - per-turn settings updates
      - initial context insertion
    - preserve `<model_switch>` across compaction by rebuilding it through
    canonical initial-context injection, instead of relying on
    strip/reattach hacks
    - centralize contextual user fragment detection in one shared definition
    table and reuse it for parsing/compaction logic
    - keep `AGENTS.md` in its natural serialized format:
      - `# AGENTS.md instructions for {dirname}`
      - `<INSTRUCTIONS>...</INSTRUCTIONS>`
    - simplify related tests/helpers and accept the expected snapshot/layout
    updates from bundled multi-part messages
    
    ## Why
    The goal is to converge toward a simpler, more intentional prompt shape
    where contextual updates are consistently represented as one developer
    envelope plus one contextual user envelope, while keeping parsing and
    compaction behavior aligned with that representation.
    
    ## Notable details
    - the temporary `SettingsUpdateEnvelope` wrapper was removed; these
    paths now return `Vec<ResponseItem>` directly
    - local/remote compaction no longer rely on model-switch strip/restore
    helpers
    - contextual user detection is now driven by shared fragment definitions
    instead of ad hoc matcher assembly
    - AGENTS/user instructions are still the same logical context; only the
    synthetic `<user_instructions>` wrapper was replaced by the natural
    AGENTS text format
    
    ## Testing
    - `just fmt`
    - `cargo test -p codex-app-server
    codex_message_processor::tests::extract_conversation_summary_prefers_plain_user_messages
    -- --exact`
    - `cargo test -p codex-core
    compact::tests::collect_user_messages_filters_session_prefix_entries
    --lib -- --exact`
    - `cargo test -p codex-core --test all
    'suite::compact::snapshot_request_shape_pre_turn_compaction_strips_incoming_model_switch'
    -- --exact`
    - `cargo test -p codex-core --test all
    'suite::compact_remote::snapshot_request_shape_remote_pre_turn_compaction_strips_incoming_model_switch'
    -- --exact`
    - `cargo test -p codex-core --test all
    'suite::client::includes_apps_guidance_as_developer_message_when_enabled'
    -- --exact`
    - `cargo test -p codex-core --test all
    'suite::client::includes_developer_instructions_message_in_request' --
    --exact`
    - `cargo test -p codex-core --test all
    'suite::client::includes_user_instructions_message_in_request' --
    --exact`
    - `cargo test -p codex-core --test all
    'suite::client::resume_includes_initial_messages_and_sends_prior_items'
    -- --exact`
    - `cargo test -p codex-core --test all
    'suite::review::review_input_isolated_from_parent_history' -- --exact`
    - `cargo test -p codex-exec --test all
    'suite::resume::exec_resume_last_respects_cwd_filter_and_all_flag' --
    --exact`
    - `cargo test -p core_test_support
    context_snapshot::tests::full_text_mode_preserves_unredacted_text --
    --exact`
    
    ## Notes
    - I also ran several targeted `compact`, `compact_remote`,
    `prompt_caching`, `model_visible_layout`, and `event_mapping` tests
    while iterating on prompt-shape changes.
    - I have not claimed a clean full-workspace `cargo test` from this
    environment because local sandbox/resource conditions have previously
    produced unrelated failures in large workspace runs.
  • chore: remove codex-core public protocol/shell re-exports (#12432)
    ## Why
    
    `codex-rs/core/src/lib.rs` re-exported a broad set of types and modules
    from `codex-protocol` and `codex-shell-command`. That made it easy for
    workspace crates to import those APIs through `codex-core`, which in
    turn hides dependency edges and makes it harder to reduce compile-time
    coupling over time.
    
    This change removes those public re-exports so call sites must import
    from the source crates directly. Even when a crate still depends on
    `codex-core` today, this makes dependency boundaries explicit and
    unblocks future work to drop `codex-core` dependencies where possible.
    
    ## What Changed
    
    - Removed public re-exports from `codex-rs/core/src/lib.rs` for:
    - `codex_protocol::protocol` and related protocol/model types (including
    `InitialHistory`)
      - `codex_protocol::config_types` (`protocol_config_types`)
    - `codex_shell_command::{bash, is_dangerous_command, is_safe_command,
    parse_command, powershell}`
    - Migrated workspace Rust call sites to import directly from:
      - `codex_protocol::protocol`
      - `codex_protocol::config_types`
      - `codex_protocol::models`
      - `codex_shell_command`
    - Added explicit `Cargo.toml` dependencies (`codex-protocol` /
    `codex-shell-command`) in crates that now import those crates directly.
    - Kept `codex-core` internal modules compiling by using `pub(crate)`
    aliases in `core/src/lib.rs` (internal-only, not part of the public
    API).
    - Updated the two utility crates that can already drop a `codex-core`
    dependency edge entirely:
      - `codex-utils-approval-presets`
      - `codex-utils-cli`
    
    ## Verification
    
    - `cargo test -p codex-utils-approval-presets`
    - `cargo test -p codex-utils-cli`
    - `cargo check --workspace --all-targets`
    - `just clippy`
  • core tests: use hermetic mock server in review suite (#12291)
    ## Summary
    - switch the review test SSE mock helper to use the shared hermetic mock
    server setup
    - ensure review tests always have a default `/v1/models` stub during
    Codex session bootstrap
    - remove the race that caused intermittent `/v1/models` connection
    failures and flaky ETag refresh assertions
    
    ## Testing
    - `just fmt`
    - `cargo test -p codex-core --test all
    refresh_models_on_models_etag_mismatch_and_avoid_duplicate_models_fetch`
    - `cargo test -p codex-core --test all
    review_uses_custom_review_model_from_config`
    - repeated both targeted tests 5x in a loop
    - `cargo clippy -p codex-core --tests -- -D warnings`
  • Reapply "Add app-server transport layer with websocket support" (#11370)
    Reapply "Add app-server transport layer with websocket support" with
    additional fixes from https://github.com/openai/codex/pull/11313/changes
    to avoid deadlocking.
    
    This reverts commit 47356ff83c.
    
    ## Summary
    
    To avoid deadlocking when queues are full, we maintain separate tokio
    tasks dedicated to incoming vs outgoing event handling
    - split the app-server main loop into two tasks in
    `run_main_with_transport`
       - inbound handling (`transport_event_rx`)
       - outbound handling (`outgoing_rx` + `thread_created_rx`)
    - separate incoming and outgoing websocket tasks
    
    ## Validation
    
    Integration tests, testing thoroughly e2e in codex app w/ >10 concurrent
    requests
    
    <img width="1365" height="979" alt="Screenshot 2026-02-10 at 2 54 22 PM"
    src="https://github.com/user-attachments/assets/47ca2c13-f322-4e5c-bedd-25859cbdc45f"
    />
    
    ---------
    
    Co-authored-by: jif-oai <jif@openai.com>
  • chore: add phase to message responseitem (#10455)
    ### What
    
    add wiring for `phase` field on `ResponseItem::Message` to lay
    groundwork for differentiating model preambles and final messages.
    currently optional.
    
    follows pattern in #9698.
    
    updated schemas with `just write-app-server-schema` so we can see type
    changes.
    
    ### Tests
    Updated existing tests for SSE parsing and hydrating from history
  • remove sandbox globals. (#9797)
    Threads sandbox updates through OverrideTurnContext for active turn
    Passes computed sandbox type into safety/exec
  • Use test_codex more (#9961)
    Reduces boilderplate.
  • feat: ephemeral threads (#9765)
    Add ephemeral threads capabilities. Only exposed through the
    `app-server` v2
    
    The idea is to disable the rollout recorder for those threads.
  • feat(core) update Personality on turn (#9644)
    ## Summary
    Support updating Personality mid-Thread via UserTurn/OverwriteTurn. This
    is explicitly unused by the clients so far, to simplify PRs - app-server
    and tui implementations will be follow-ups.
    
    ## Testing
    - [x] added integration tests
  • Support end_turn flag (#9698)
    Experimental flag that signals the end of the turn.
  • chore(instructions) Remove unread SessionMeta.instructions field (#9423)
    ### Description
    - Remove the now-unused `instructions` field from the session metadata
    to simplify SessionMeta and stop propagating transient instruction text
    through the rollout recorder API. This was only saving
    user_instructions, and was never being read.
    - Stop passing user instructions into the rollout writer at session
    creation so the rollout header only contains canonical session metadata.
    
    ### Testing
    
    - Ran `just fmt` which completed successfully.
    - Ran `just fix -p codex-protocol`, `just fix -p codex-core`, `just fix
    -p codex-app-server`, `just fix -p codex-tui`, and `just fix -p
    codex-tui2` which completed (Clippy fixes applied) as part of
    verification.
    - Ran `cargo test -p codex-protocol` which passed (28 tests).
    - Ran `cargo test -p codex-core` which showed failures in a small set of
    tests (not caused by the protocol type change directly):
    `default_client::tests::test_create_client_sets_default_headers`,
    several `models_manager::manager::tests::refresh_available_models_*`,
    and `shell_snapshot::tests::linux_sh_snapshot_includes_sections` (these
    tests failed in this CI run).
    - Ran `cargo test -p codex-app-server` which reported several failing
    integration tests (including
    `suite::codex_message_processor_flow::test_codex_jsonrpc_conversation_flow`,
    `suite::output_schema::send_user_turn_*`, and
    `suite::user_agent::get_user_agent_returns_current_codex_user_agent`).
    - `cargo test -p codex-tui` and `cargo test -p codex-tui2` were
    attempted but aborted due to disk space exhaustion (`No space left on
    device`).
    
    ------
    [Codex
    Task](https://chatgpt.com/codex/tasks/task_i_696bd8ce632483228d298cf07c7eb41c)
  • Add text element metadata to types (#9235)
    Initial type tweaking PR to make the diff of
    https://github.com/openai/codex/pull/9116 smaller
    
    This should not change any behavior, just adds some fields to types
  • Use current model for review (#9179)
    Instead of having a hard-coded default review model, use the current
    model for running `/review` unless one is specified in the config.
    
    Also inherit current reasoning effort
  • chore: unify conversation with thread name (#8830)
    Done and verified by Codex + refactor feature of RustRover
  • feat: expose outputSchema to user_turn/turn_start app_server API (#8377)
    What changed
    - Added `outputSchema` support to the app-server APIs, mirroring `codex
    exec --output-schema` behavior.
    - V1 `sendUserTurn` now accepts `outputSchema` and constrains the final
    assistant message for that turn.
    - V2 `turn/start` now accepts `outputSchema` and constrains the final
    assistant message for that turn (explicitly per-turn only).
    
    Core behavior
    - `Op::UserTurn` already supported `final_output_json_schema`; now V1
    `sendUserTurn` forwards `outputSchema` into that field.
    - `Op::UserInput` now carries `final_output_json_schema` for per-turn
    settings updates; core maps it into
    `SessionSettingsUpdate.final_output_json_schema` so it applies to the
    created turn context.
    - V2 `turn/start` does NOT persist the schema via `OverrideTurnContext`
    (it’s applied only for the current turn). Other overrides
    (cwd/model/etc) keep their existing persistent behavior.
    
    API / docs
    - `codex-rs/app-server-protocol/src/protocol/v1.rs`: add `output_schema:
    Option<serde_json::Value>` to `SendUserTurnParams` (serialized as
    `outputSchema`).
    - `codex-rs/app-server-protocol/src/protocol/v2.rs`: add `output_schema:
    Option<JsonValue>` to `TurnStartParams` (serialized as `outputSchema`).
    - `codex-rs/app-server/README.md`: document `outputSchema` for
    `turn/start` and clarify it applies only to the current turn.
    - `codex-rs/docs/codex_mcp_interface.md`: document `outputSchema` for v1
    `sendUserTurn` and v2 `turn/start`.
    
    Tests added/updated
    - New app-server integration tests asserting `outputSchema` is forwarded
    into outbound `/responses` requests as `text.format`:
      - `codex-rs/app-server/tests/suite/output_schema.rs`
      - `codex-rs/app-server/tests/suite/v2/output_schema.rs`
    - Added per-turn semantics tests (schema does not leak to the next
    turn):
      - `send_user_turn_output_schema_is_per_turn_v1`
      - `turn_start_output_schema_is_per_turn_v2`
    - Added protocol wire-compat tests for the merged op:
      - serialize omits `final_output_json_schema` when `None`
      - deserialize works when field is missing
      - serialize includes `final_output_json_schema` when `Some(schema)`
    
    Call site updates (high level)
    - Updated all `Op::UserInput { .. }` constructions to include
    `final_output_json_schema`:
      - `codex-rs/app-server/src/codex_message_processor.rs`
      - `codex-rs/core/src/codex_delegate.rs`
      - `codex-rs/mcp-server/src/codex_tool_runner.rs`
      - `codex-rs/tui/src/chatwidget.rs`
      - `codex-rs/tui2/src/chatwidget.rs`
      - plus impacted core tests.
    
    Validation
    - `just fmt`
    - `cargo test -p codex-core`
    - `cargo test -p codex-app-server`
    - `cargo test -p codex-mcp-server`
    - `cargo test -p codex-tui`
    - `cargo test -p codex-tui2`
    - `cargo test -p codex-protocol`
    - `cargo clippy --all-features --tests --profile dev --fix -- -D
    warnings`
  • fix: /review to respect session cwd (#8738)
    Fixes /review base-branch prompt resolution to use the session/turn cwd
    (respecting runtime cwd overrides) so merge-base/diff guidance is
    computed from the intended repo; adds a regression test for cwd
    overrides; tested with cargo test -p codex-core --test all
    review_uses_overridden_cwd_for_base_branch_merge_base.
  • chore: migrate from Config::load_from_base_config_with_overrides to ConfigBuilder (#8276)
    https://github.com/openai/codex/pull/8235 introduced `ConfigBuilder` and
    this PR updates all call non-test call sites to use it instead of
    `Config::load_from_base_config_with_overrides()`.
    
    This is important because `load_from_base_config_with_overrides()` uses
    an empty `ConfigRequirements`, which is a reasonable default for testing
    so the tests are not influenced by the settings on the host. This method
    is now guarded by `#[cfg(test)]` so it cannot be used by business logic.
    
    Because `ConfigBuilder::build()` is `async`, many of the test methods
    had to be migrated to be `async`, as well. On the bright side, this made
    it possible to eliminate a bunch of `block_on_future()` stuff.
  • Support SYSTEM skills. (#8220)
    1. Remove PUBLIC skills and introduce SYSTEM skills embedded in the
    binary and installed into $CODEX_HOME/skills/.system at startup.
    2. Skills are now always enabled (feature flag removed).
    3. Update skills/list to accept forceReload and plumb it through (not
    used by clients yet).
  • Revert "chore: review in read-only (#7593)" (#8127)
    This reverts commit 291b54a762.
    
    This commit was intended to prevent the model from making code changes
    during `/review`, which is sometimes does. Unfortunately, it has other
    unintended side effects that cause `/review` to fail in a variety of
    ways. See #8115 and #7815. We've therefore decided to revert this
    change.
  • make model optional in config (#7769)
    - Make Config.model optional and centralize default-selection logic in
    ModelsManager, including a default_model helper (with
    codex-auto-balanced when available) so sessions now carry an explicit
    chosen model separate from the base config.
    - Resolve `model` once in `core` and `tui` from config. Then store the
    state of it on other structs.
    - Move refreshing models to be before resolving the default model
  • Update defaults to gpt-5.1 (#6652)
    ## Summary
    - update documentation, example configs, and automation defaults to
    reference gpt-5.1 / gpt-5.1-codex
    - bump the CLI and core configuration defaults, model presets, and error
    messaging to the new models while keeping the model-family/tool coverage
    for legacy slugs
    - refresh tests, fixtures, and TUI snapshots so they expect the upgraded
    defaults
    
    ## Testing
    - `cargo test -p codex-core
    config::tests::test_precedence_fixture_with_gpt5_profile`
    
    
    ------
    [Codex
    Task](https://chatgpt.com/codex/tasks/task_i_6916c5b3c2b08321ace04ee38604fc6b)
  • ignore agent message deltas for the review mode (#5937)
    The deltas produce the whole json output. ignore them.
  • feat: annotate conversations with model_provider for filtering (#5658)
    Because conversations that use the Responses API can have encrypted
    reasoning messages, trying to resume a conversation with a different
    provider could lead to confusing "failed to decrypt" errors. (This is
    reproducible by starting a conversation using ChatGPT login and resuming
    it as a conversation that uses OpenAI models via Azure.)
    
    This changes `ListConversationsParams` to take a `model_providers:
    Option<Vec<String>>` and adds `model_provider` on each
    `ConversationSummary` it returns so these cases can be disambiguated.
    
    Note this ended up making changes to
    `codex-rs/core/src/rollout/tests.rs` because it had a number of cases
    where it expected `Some` for the value of `next_cursor`, but the list of
    rollouts was complete, so according to this docstring:
    
    
    https://github.com/openai/codex/blob/bcd64c7e7231d6316a2377d1525a0fa74f21b783/codex-rs/app-server-protocol/src/protocol.rs#L334-L337
    
    If there are no more items to return, then `next_cursor` should be
    `None`. This PR updates that logic.
    
    
    
    
    
    
    ---
    [//]: # (BEGIN SAPLING FOOTER)
    Stack created with [Sapling](https://sapling-scm.com). Best reviewed
    with [ReviewStack](https://reviewstack.dev/openai/codex/pull/5658).
    * #5803
    * #5793
    * __->__ #5658
  • Add ItemStarted/ItemCompleted events for UserInputItem (#5306)
    Adds a new ItemStarted event and delivers UserMessage as the first item
    type (more to come).
    
    
    Renames `InputItem` to `UserInput` considering we're using the `Item`
    suffix for actual items.
  • Remove instruction hack for /review (#4896)
    We use to put the review prompt in the first user message as well to
    bypass statsig overrides, but now that's been resolved and instructions
    are being respected, so we're duplicating the review instructions.
  • Use wait_for_event helpers in tests (#4753)
    ## Summary
    - replace manual event polling loops in several core test suites with
    the shared wait_for_event helpers
    - keep prior assertions intact by using closure captures for stateful
    expectations, including plan updates, patch lifecycles, and review flow
    checks
    - rely on wait_for_event_with_timeout where longer waits are required,
    simplifying timeout handling
    
    ## Testing
    - just fmt
    
    
    ------
    https://chatgpt.com/codex/tasks/task_i_68e1d58582d483208febadc5f90dd95e
  • make tests pass cleanly in sandbox (#4067)
    This changes the reqwest client used in tests to be sandbox-friendly,
    and skips a bunch of other tests that don't work inside the
    sandbox/without network.
  • Add dev message upon review out (#3758)
    Proposal: We want to record a dev message like so:
    
    ```
    {
          "type": "message",
          "role": "user",
          "content": [
            {
              "type": "input_text",
              "text": "<user_action>
      <context>User initiated a review task. Here's the full review output from reviewer model. User may select one or more comments to resolve.</context>
      <action>review</action>
      <results>
      {findings_str}
      </results>
    </user_action>"
            }
          ]
        },
    ```
    
    Without showing in the chat transcript.
    
    Rough idea, but it fixes issue where the user finishes a review thread,
    and asks the parent "fix the rest of the review issues" thinking that
    the parent knows about it.
    
    ### Question: Why not a tool call?
    
    Because the agent didn't make the call, it was a human. + we haven't
    implemented sub-agents yet, and we'll need to think about the way we
    represent these human-led tool calls for the agent.
  • Review mode core updates (#3701)
    1. Adds the environment prompt (including cwd) to review thread
    2. Prepends the review prompt as a user message (temporary fix so the
    instructions are not replaced on backend)
    3. Sets reasoning to low
    4. Sets default review model to `gpt-5-codex`
  • enable-resume (#3537)
    Adding the ability to resume conversations.
    we have one verb `resume`. 
    
    Behavior:
    
    `tui`:
    `codex resume`: opens session picker
    `codex resume --last`: continue last message
    `codex resume <session id>`: continue conversation with `session id`
    
    `exec`:
    `codex resume --last`: continue last conversation
    `codex resume <session id>`: continue conversation with `session id`
    
    Implementation:
    - I added a function to find the path in `~/.codex/sessions/` with a
    `UUID`. This is helpful in resuming with session id.
    - Added the above mentioned flags
    - Added lots of testing
  • Fix flaky windows test (#3564)
    There are exactly 4 types of flaky tests in Windows x86 right now:
    
    1. `review_input_isolated_from_parent_history` => Times out waiting for
    closing events
    2. `review_does_not_emit_agent_message_on_structured_output` => Times
    out waiting for closing events
    3. `auto_compact_runs_after_token_limit_hit` => Times out waiting for
    closing events
    4. `auto_compact_runs_after_token_limit_hit` => Also has a problem where
    auto compact should add a third request, but receives 4 requests.
    
    1, 2, and 3 seem to be solved with increasing threads on windows runner
    from 2 -> 4.
    
    Don't know yet why # 4 is happening, but probably also because of
    WireMock issues on windows causing races.
  • Review Mode (Core) (#3401)
    ## 📝 Review Mode -- Core
    
    This PR introduces the Core implementation for Review mode:
    
    - New op `Op::Review { prompt: String }:` spawns a child review task
    with isolated context, a review‑specific system prompt, and a
    `Config.review_model`.
    - `EnteredReviewMode`: emitted when the child review session starts.
    Every event from this point onwards reflects the review session.
    - `ExitedReviewMode(Option<ReviewOutputEvent>)`: emitted when the review
    finishes or is interrupted, with optional structured findings:
    
    ```json
    {
      "findings": [
        {
          "title": "<≤ 80 chars, imperative>",
          "body": "<valid Markdown explaining *why* this is a problem; cite files/lines/functions>",
          "confidence_score": <float 0.0-1.0>,
          "priority": <int 0-3>,
          "code_location": {
            "absolute_file_path": "<file path>",
            "line_range": {"start": <int>, "end": <int>}
          }
        }
      ],
      "overall_correctness": "patch is correct" | "patch is incorrect",
      "overall_explanation": "<1-3 sentence explanation justifying the overall_correctness verdict>",
      "overall_confidence_score": <float 0.0-1.0>
    }
    ```
    
    ## Questions
    
    ### Why separate out its own message history?
    
    We want the review thread to match the training of our review models as
    much as possible -- that means using a custom prompt, removing user
    instructions, and starting a clean chat history.
    
    We also want to make sure the review thread doesn't leak into the parent
    thread.
    
    ### Why do this as a mode, vs. sub-agents?
    
    1. We want review to be a synchronous task, so it's fine for now to do a
    bespoke implementation.
    2. We're still unclear about the final structure for sub-agents. We'd
    prefer to land this quickly and then refactor into sub-agents without
    rushing that implementation.